Function tidyGetArgFormat 

pub unsafe extern "C" fn tidyGetArgFormat(
    tmessage: TidyMessage,
    arg: *mut TidyMessageArgument,
) -> ctmbstr

Returns the format specifier of the given message argument. The memory for this string is cleared upon termination of the callback, so do be sure to make your own copy. @result Returns the format specifier string of the given argument.